_____ we have built “the Green Wall’, _____we still need to work hard to protect our environment.
| A．Although ;but | B．Although ;\ |
| C．Since ;so | D．Since ;but |
We are too tired. Let’s stop ______ a rest.
A. to have B．have C．having
There are _______ people in the hall.
A. hundred of B. hundreds of C. three hundreds
There is ________ wrong with my back and it hurts seriously.
A. anything B. something C. nothing
— is it from here to the station？
— It's about three kilometers from here.
A. How long B. How far C. How
–Rose, could you please water the flowers in the garden?
--Why _________? You see, my brother is listening to music.
A. me B. I C. mine